cy·a·noch·ro·ite \ˌsīəˈnäkrəˌwīt\noun (-s) Etymology: modification of Italian cianocrome (from ciano- cyan- + -crome, from Greek chrōma color) + English -ite — more at chromatic : a mineral K2Cu(SO4)2.6H2O consisting of a hydrous sulfate of potassium and copper found rarely at Vesuvius